Warren slams Brown for his support of a bill that would allow any business to be exempted from providing birth control coverage to their employees if the owner has a “moral conviction” and says she supports Obama’s compromise. Health care decisions like this, Warren writes in her op-ed, “should be up to women and their doctors.”

“This bill is about how to cut coverage for basic health care services for women,” Warren writes. “Let’s be clear what this proposed law is not about: This is not about Catholic institutions or the rights of Catholics to follow their faith.”

Brown takes a different tack in his op-ed, writing that the contraception mandate challenges religious liberty and “fundamental fairness.”

“As a husband and father of two daughters, I believe insurance companies should have to cover services that many women want and rely on. But I also recognize that there are some people who, based on their deepest moral and religious convictions, don’t agree with me regarding some of those services. We must seek to respect their rights, too,” he writes.

Invoking his predecessor Sen. Ted Kennedy, who Brown notes supported a conscience exemption, the Republican writes that Warren “wants to take us in a different direction.”